yougarage
Member level 1
Hello! I want to use a zener diode to protect the input pin of a microcontroller from overvoltages, but I really don't know which one to choose.
The pin is fed by a 2200 ohm resistor, and after that, the zener to ground.
I attached 2 sections of datasheets about 2 different zeners, they have very different values of Zzt, but i don't know which one is "better"
I don't really understand in practice what the Zzt value means...
For what I think, it's the resistance while it's in the breakdown region, so lower is better
is this right?
any advice is greatly welcome!
The pin is fed by a 2200 ohm resistor, and after that, the zener to ground.
I attached 2 sections of datasheets about 2 different zeners, they have very different values of Zzt, but i don't know which one is "better"
I don't really understand in practice what the Zzt value means...
For what I think, it's the resistance while it's in the breakdown region, so lower is better
is this right?
any advice is greatly welcome!